Electric motor.



W. BARNES, Jn. ELECTRIC MDTOR. APPLICATION msn Dsc. 29, 1909.

Patented Ama 13, 11915.

3 SHEETS-SHEET 1.

INVENTOR TRNEY n1: Nanms Erstes cc., usm/varon, a. c.

W. "BARNES, Jn. ELECTRIC IIIOTOB.

APPLICATION FILED DEC.29 |909. 111MW Patented Apr. 13, 1915.

I 3 SHEETS-SHEET 2.

WITNESSES:

W. BARNES, la. ELECTRIC MOTOR.

Prue/mou man Dsc. 29. 1909.

Patented Apr. 13, 11915.

3 SHEETS-SHEET 3.

VVITNESSES:

WE Nomals persas 50,. wasummorv, D, c.

wILEEEn EAENEs, JE., CE wILnINsEUnG, PENNSYLVANIA, AssIeNoE 'ro wEsTING-noUsE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION 0E PENN-SYLVANIA.

ELECTRIC Moron.

Specification of Letters Patent.

Patented Apr. 13, i915.

Application led December 29, 1909. A Serial No. 535,404.

T0 all 107mm it may concern.'

Be it known that I, 1WILFRED BARNES, J r., a citizen of the UnitedStates, and a resident of `Wilkinsburg, in the county of Allegheny andState of Pennsylvania, have invented a new and useful Improvement inElectric Motors, of which the following is a specification.

, My invention relates to dynamo-electric machines and particularly tothe mechanical features of electric motors ol small size.

The object of my invention is to provide a simple and durable motorhaving such mechanical structure and such accessories as to render itadaptable to various small power operations. For example; it is my aimto provide an efficient motor, which may be used as an ordinary fan orblower motor, for driving a sewing machine and for various otherhousehold purposes, as more fully pointed out hereinafter.

Since electric energy is so generally used for lighting purposes, notonly in` large public buildings, but also in private residences, the useof small electric motors for household purposes has become very general,more particularly, for operating fans and sewing machines. Motors 'ofthe prior art have usually been so designed and constructed that theywere only adapted for speciic purposes and it was thereforel necessaryto utilize several motors in order to accomplish several diiterentoperations, none of which require a continuous, or even a frequentlyrecurring, service.

According to my present invention, l provide a motor structure and alarge number of simple means coperating therewith whereby the same motormay be utilized successfully for many di'erent kinds of service.

Figure 1 of the accompanying drawings is a iront elevation, partially insection, of a motor constructed in accordance with my invention, a fanand a fan guard being shown attached to it. Fig. 2 is a side elevationof the motor shown in Fig. 1, the fan being replaced in this ligure bygrinding and buihng wheels, and the double trunnion of Fig. 1 beingremoved. Fig. 3 is an end view of the motor body shown in Fig. 2. Fig.4e is a detail view of the double trunnion shown in Fig. 1, the motorbody being shown in broken lines.

Referring to the drawings, the motor here s shown comprises a frame orbody 1, having a pair of end bells or brackets 2 and 3, a base 4: and arotatable shaft 5 on which the motor armature is mounted.

The body or frame of the motor is pro- 6o vided with a downwardlyextending cylindrical projection 6 having an annular groove 7, and witha handle grip 8 which projects upwardly from the frame and by which themotor may be readily carried from place to place.

rllhe base 4 is provided with a recess 9, which is adapted to receivethe projection 6, as shown in Fig. 2, and with a hole 10, which forms abearing i'or a rest or guide 70 11. A thumbscrew 12 is threaded into thebase and projects into the recess 9, it being adapted to engage any oneof a plurality of indentations 10a in the base of the annular groove 7in order to accentuate predeter- 75 mined positions of the motor. Thearrange ment of parts is such that the thumbscrew may prevent the motorframe from being accidentally seperated from the base, while rotation ofsaid frame thereon is permitted. rlhe thumbscrew may, of course, be usedfor rigidly clamping the motor frame to the base in any desiredposition.

A step pulley 13 is attached to the end of the shaft 5 and comprises ahub member 13a 85 to which may be attached the fan 17 of Fig. 1`, thegrindingrand buifing wheels 18 and 19 of Fig. l2, or any other suitableattachment with which the motor may be provided. j j p 9o Thearrangement and form of the parts are such that the outer shell of thepulley 13 may bey easily removed and reversed when it is desired toadjust the maximum speed of a sewing machine or other device to whichthe motor is belt-connected, and no adjustment of the alinement of anintermediate or idle pulley is necessary. The pulley 13 thus serves as achuck for holding the other attachments, but it may also be used,independently of them, for driving purposes.

The member 11 may be utilized as a'tool rest if it is desired to use themotor shaft as a turning lathe, or it may be used as a work rest whenthe grinding and buiiing wheels, or other tools, are rotated by themotor shaft.

A drill chuck or face plate may, ofcourse,

be substitutedfo'r thedevices 18 and 19 Vcf Fig. l2, in which case,variousboring`opera V 'tions may be performed.

The ,double trunnion comprises an Aouter yoke; 20 having` a projection21: correspond-y lng to the projection ofthe motor frame,

by which it may be rotatably supported upon the base 4,- andan inneryoke 22 havingjV afr'ece'ss 23 which corresponds to the recess 9 in thebase and which is adapted to receiveA the projection 6 of the motorYfra-Ine. `The providedV with a thumbscrew 25 which correspondsto thescrew12 on thebase and is adaptedv to engage the groove 7 the pro-Ajection 6. AThe larrangement of parts is such that the doubletrunnionconstitutes a unil versal'joint' connection between the motor if frameVand the base, whenit iszutilized, but,

nevertheless,the double trunnion bediscarded without exposing anyunsightly' projections'and without detracting from the j proportion; andsymmetry of they motor. The doubletrunnion may, of course, be em-V`p'lfoyed"inot"only whenvr the fanis in use, but at 'any Vtime when itis found' convenient. Y

Thefa'n'- 17 is provided witha .guard 26 j having'anysuitablecylindrical cage structureforinclosin'g the falfbldesanda tri' i"angular'supp'ort 27 by which-it is removably attached'to the'motorframe; f The support 27- "is" composed 4of a triangularfcenter 28:

from which fafpluralitycf arms-29 Yextend radially outward. l HThe.ytriangular Center is provided with"l notches which 4vare adapted'torengage screws or` rivets 31' with which the vweind Vbell 2.*of fthermotor is equipped, a

thirdpo'int of' support being provided by i means of 1a" thumbscre-,w-v31a c. which projects through :a `holefrcinv "theY frame'27rand isscrewed into the'end befll2fo'fV theT motor.

. The jend'bell 'of themtor isprovided with, a snap' switch 32'by whichvthe'motor circuit may be interrupted Mld; With a Plugwand socketconnector 33, to one portion of which` the .external circuit conductors34 are connected. y

It is evident that structural modifica ions may be. effected within thespirit and s ope of my invention Vand. I' desire that only uchlimitations shall be imposed a's'areindicted in the appended claims.

claim as my invention:

1."In an electric motor, the combination with a stationary base having arecess and a locking screw, of a frame or body having a downwardlyextending projection adapted to engage the recess in the base and havinga circumferential recessto receive the end of l saidloclzingf screw, anda double trunnion comprising two yokes one of which has a cylindricalprojection provided with aV circumferential recess `and the other ofwhich has a cylindrical recess, and a'locking screw. y j

2. In a portable electricmotor, the combination with a frame having acylindrical projection provided with a circumferential groovevcontaining accentuating indentations, a' base having a cylindricalrecess jand a locking" screw, of an interposed double trunnioncomprising two yokes one of which has ja cylindrical projection providedwith acircumferential recess containing accentuating indentations andthe other of which n has a cylindrical recess and a locking screw. 80

.interposed for providing a universal joint connection between the motorand the base, and i a rest or kguide adjustably z supported inthetransverse recess of the base.

.w In .testimony whereof, have hereunto subscribed my name this 15thdayfcf Dec., 1909. l v. .it l

W ILFRED BARNES, JR. litnessem i `l l` Rf J. DEnBoRN,

Hines.

` Copies of thispatent maybe obtained for ve cents each, by addressingthe "f Commissioner of Patents,

f f Washngtonj). CL

